Improvement in self-closing cocks



dilated gatuite WILLIAM DALZIEL,

OF NEW YORK, N. Y.v

Letters Patent No. 111,518, dated February 7,1871.

IMPROVEMENT IN SELF-CLOSING COCKS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom 'tt may concern drawing forming part of this specification.

Figure 1 represents a horizontal section of my iinproved-self-'closingcock, the plane of section being indicated by the line x x,1ig. 2. l

Figure 2 is a vertical longitudinal section 'of the same taken on theplane of the liney y, iig. l.

Figure 3 is a detail vertical sectional view showing the parts in awdifferent position.

Similar letters of reference indicate correspomlihg parts. g

This invention has for its object to prevent the waste of water or otherliquid drawn i'roin reservoirs or other limited supply.

Theinvention consists in providing the cock through which such liquidis'` drawn with a self-acting apparatus, whereby, after a certainqnantityof the liquid has been drawn, vthe cock will invariably beclosed.

The closing apparatus consists ot' a piston,which is gradually raisedby, the liquid, and carries a valve, whereby the discharge is ultimatelystopped.

By the use of this invention the waste ot' water is not only prevented,but also the injury to buildings occasioned by carelessly leaving openthe cocks.

A in the drawing represents thc stationary pipe or conduit of the cock.

B is the movable cock.

lhe pipe A is, at d, connected with the water-sup ply pipe, and containsa partition, b, which has an aperture, c, near its outer end, the saidaperture serving to connect the chambers or channels vthat are formed bythe partition b.

Gis a cylinder arranged under the upperarni ot the`pipe A and above theouter partof the cock B.

The cylinder O contains a piston, D, which, on its stem, carriesa valve,d, for closing th'c aperture c.

A small pipe, e,.leads from the outer channel, j, ot' the pipe-A, intothe lbwer part of the` cylinder.

The cock B is open at its inner end to receive water from' the innerchannel g of the pipe A, and has a discharge-opening, 7l, whereby itcommunicates with the nozzle t'.

The ii'ont part ofthe cock is solid, z'. c., not continued tubular, andcontains a transverse orifice, j, for drawing water from the cylinder(l, which has an opere, ing, K, in its bottom.

The water from the supply-pipe passes up in the channel j, through theorifice c, down the channel g, and into the cock B, being conducted intothe nozzle it' said cock is turned open, as in fig. 2. At the saine timewater passes slowly intothe cylinder O through the pipe c, and raisesthe piston until the same finally closes the oriticc c, stopping thefurther discharge ot' water. No more water can therefore bc drawn thanthe cylinder G will allow, t. c., whenever the cylinder is filled thepipe will be certainly closed.

llie'valvc-can next be turned to discharge the water from the' cylinderthrough the openings K and j, as in iig. 3, when the valve will again beopened.

l is an air-pipe connecting the upper part ofthe cylinder with thenozzle. 1t serves to carry ott' the air while the piston is raised, andto let it-in when the saine descends.

Having thus described my invention,

claim as new and desire to Vsecure by Letters lateut- 1. rlhe cock,provided with a piston and valve, which are operated by a small portionof the liquid passing through the cock for automatically closing thesame, as set forth.

.2. the pipe A, divided by a partition, b, into two channels, fand g,that are connected by an aperture7 c, which canbe closed by `a valve,substantially as herein shownand described.

3. rlhe pipe c, leading from the main pipe A to the cylinder (l, forconducting water to the piston which closes the valve, asset forth. v

d. rlhe cock B, constructed with` two sets of openings, one fordischarging water trom the pipe A, and one for emptying the cylinder C,substantially as herein shown and described.

The above specification ot` my invention signed by me this 2d day ofAugust, 1870.

WILLIAM DALZIEL.

W'it'nesses GEO. W. Manen, l. B. Mostrar..

